Post-game Handshake

What is Post-game Handshake?

A tradition in hockey after the game is completed where the
players from each team form lines and shake hands with the opposing
teams players at center ice. In the NHL, the post-game Handshake is
only done in the playoffs after the series is won by one
team.

Sporting Charts explains Post-game Handshake

The post-game handshake is a tradition in sports that is meant
to symbolize sportsman ship among the players of the
game.